Cross-dyeing cellulose fabric



' addition a fast color isnot produced. Vari- Patented Ma 24, 1927, I v

MASSACHUSETTS, ASSIGNOR or one-1mm Tonnonn. rsnann.

JOHN c. WATSON, or ,aTTLEBono,

1 Tnaynn r. GATES, or 'rnovrnnncn,

' CROSS-DYEIKG CELLULOSE FABRIC.

No Drawing. Application as my 20, 1926. Serial mfiaaaoa.

My invention relates to an improved 'proc-- ous' types of two step dyeing processes are ess of manufacturing an all cellulosetextile fabric in contrasting colors. I employ-the words cellulose textile fabric to. include an 5 all" cotton fabric, or a fabric made fIiOIIlathG type of rayons which contain substantially the same percentageof cellulose as cotton or a greater percentage of cellulose and which have substantially the sameafiinity for the same type of dyestufis' as cotton namely, viscose,- rayon, cupraeammonium rayonand vchardonet rayon, etc, entirely or mixed with cotton. An application Serial No. 123,801 is filed of even date herewith which is, a'continuation in part of.'applica-' tion #73, 4=71, filed Dec. 5, 1925, which dis- I closesbroadly the same invention as this application. There is filed of even date herewith a second application Serial No. 103,802,

a continuation in part of application #94,-

089, filed Mar. 11, 1926, covering specifically a second species of the broad invention disclosed, in this a pplication Serial #123,801, filed Julyv20, 1926. This application covers a third species of the invention,

Hitherto where it has been desired to produce a fabric having a two color effect, either the warp or the filling have been woven of two difierent materials such as cotton and silk which will take the dye in different shades or amounts, or the warp or filling yarns have had to beseparately dyed with two different colors prior to weaving.

The main feature of my process isto treat the warp during the slashing process with the first step of a two step dyeing process, the nature of the ingredient-thereo of my invention what type of a two step dyeing process be employed so longas one chosen wherein the first'step' has no appreciable efi'ectmpon-the functionin of the s1ze, nor the' size on its function' g. The types of twostep dyeing processes however, may be generally classed as'three namely, (A) Where" the first step thereof'consists of treating the warp with a water soluble chemcal having non-dyeing properties, suc as an organic or inorganic niordant or a soluble mineral salt as described vin'my applicatlon 'Ser. No."123,801 and the second Step treatingit with a dye. (B) Where the first step consists of treating it with a dye or a dye component and:the Second step consists of treating it with an'additional dye component and (C)' where the first step consists of treating the warp with a dyestufi in a true or modified form and the second step ing an oxidizing or reducing action! The subject matter of species C is specifically claimed in this application, namely, where a dyestuflt' in a true or modified form is inserted with the size and a chemical having an oxidizing or reducing action applied to the entire fabric. to combine only with the treated warp. v

I am aware that cotton goods of contrasting colors have been made by treating the warp or the filling threadsentirely independently of slashing process with a tannin mordant before weaving the cloth in the added to the size being such that will have no appreciable effect upon the functioning of the size, not will the size have any appreciable effect upon its'functioning weaving the cloth in the :usual manner with'a filling and later' treating'the fabric with the Second step of a two step dyeing process, which acts upon the prepared warp to form the dye thereon. I am aware that hitherto it has been suggested to add a direct or Substantive dye to the size to simultaneously size and dye the fabric with a one step dyeing process. As the actual water-soluble dye has to be inserted with the size it is obvious that in a then passed through aslasher box to cover short. space of time, the size bath will beit with a size so that the individual warp come messy and the dyeing irregular and in threads will stand up during the friction and wear they receive in the weaving procthen dyeing the fabric with a basic color which acts upon the mordanted warp alone and later dyeing the filling. This process is impractical and expensive for two reasons 1 It requires the extra cost of an entirely disently ofany sizing and prior to weaving of suit-ably treating the proper threads. with a inordant orv other first step of 'a two "step dyeing process. Thus the added cost of this added step makes this method of dyeing impractical. The warp is first beamed in a suitable fashion for use in a loom and knownand it is immaterial for the purposes consists of treating it with a chemical havusual manner with an unprepared filling and a tinct and separate step namely independess, the fabric is then woven in the usual manner. Thus in the usual grey cloth manu- .facturing plants at present there is no suitable dyeing or mordanting apparatus for performing this separate step. Employing my process however, which merely consists in putting a small amount of the ingredient of the first step of a two step dyeing process right into the slasher a piece of standard equipment in eycry cotton mill, it is obvious that 'my process can be employed without the necessity of purchasing extra dyeing or mordanting equipment or without turning the cotton mill into a dye house. After weaving the fabric in the grey form it may then be sent to thedye house where the rest of my process may becompleted to dye the fabric in contrasting colors with the usual dyeing equipment by any of the well-known processes.

in filling and then treating the entire fabric with the second step of a two step dyeing process which acts upon the prepared warp to impregnate the dye thereon, desired the filling may be left white or it may also be dyed by again dyeing the fabric with a dye of a different nature and color, which acts on the filling to dye it a contrasting color to the warp. Whether the filling be left white or redyedit is obvious that it will always be of a contrasting color to the dyed warp.

It is obvious however that a two step dyeing process may be selected wherein the first step thereof normally comprises treatin the warp not with a water soluble chemical aving non-dyeing properties, butwith a real dye ingredient or a dyestufi' in a true or modified form or an intermediate dye component, which would have no appreciable effeet on the size, nor the size on its functioning. So far as I am aware no one has hitherto conceived of manufacturing an all cel lulose textile fabric having componentsets of warp and filling threads of contrastin colors by treating before weavin one of'sai component sets .of threads wit a dyeingredient of a two step dyeing process at any stage in the preparation of said set, then weaving said component set with the other component set to form the cloth and then impregnating the dyestufi on the prepared component setb'y treating the fabric with the second step of the two step dyeing procthreads with a dye ingredient 0 ess, which acts upon the prepared component set to impregnate the dye thereon. The other component set may be either left white in a contrasting color to the dyed component set or dyed in a contrasting color by again separately dyeing the fabric with a dye of a different nature and color which acts on the unprepared set to dye it a contrasting color to the prepared. componentset. If desired each component set may be treated with a diflerent 'dye ingredient of a two step dyeing process and the entire fabric subjected to a second common ste of the twotstep dyeing process, which wil simultaneously impregnate each component set with a different dyestufl. It is thus obvious that the other component set normally-the one not sized may be either first'dyed or prepared for simultaneously forming the dyestufl' thereon with the other-component set after weaving or left unprepared. My invention is peculiarly adapted to dyethe warp threads with a relatively fast color and specifically includes simultaneously treating the warp threads with a size in the slashing process and simultaneously-treating them witha dye ingredient of a two step dyeing process in the same solution. This eliminates the extra cost of an entirely distinct and separate step, namely independently of any sizing and prior. to weaving of suitably treating the proper threads with its added cost. At present in the composite process five steps are necessary.

(1) To size. the wrap. f

(2) To treat the warp threads with a dye ingredient of a two step dyeing process.

(3) To treat the warp threads with-the second step of a two step dyeing process.

(4) To treat the filling threads with a dye I05 ingredient of a two step dyeing process.

(5) To treat the filling threads with the second. step of a two step dyeing process. Employing my invention however, where in fdigosols later to be described are employed it is obvious that these five steps may be cut down to three, namely, step one of sizing the warp threads and step two of treating the warp threads with a dye ingredient of a two step dyeing process may be done simultaneously. Step four of treatin the filling a two step dyeing proqess Wlll have tobe done so arate- .ly as usual. The sized and prepare warp threads and the prepared filling threads may be then woven and step three namely, treating the warp threads with the second step of their respective two step dyeing process and in addition ste five of treating the filling threads with their respective two step dyeingproeess may be done simultaneously by treating the warp and the filling threads in the fabric with the same step This class of a two step" dyeing process, namely where the first step in the two step dyeing process comprises treating the material to be dyed with a dye or dye ingredient divides itself into two general classes tire generic class being claimed in application Serial #123,802 filing date July 20, 1926 signed of even date herewith, acontinuation in part of application #944189, filed March 11, 1926, which specifically claims dyestuffs of "the generic sub-class B heretofore referred to. Dyeing with a type of dyestufi' hereinafter referred to in sub-class C is specifically claimed in this application.

Although as stated, the preparation of either or both of these sets .of component threads by treating them with a dye ingredient of a two stepdyeing process. may be done at any point in the preparation prior to weaving, I referably so treat the warp threads while s ashing and I will specifically describe this treatment in this description of the application of the following dyes. As stated however, it is immaterial whether the filling be first dyed, separatel prepared by treating it with a dye ingre ient ofa two step dyeing processor left unprepared.

I will now specifically describe the appli cation of class C of the two step dyeing process where the first step 'of a two step dyeing process comprises treating the fabric with a dyestufli' modified or unmodified and the second step thereof comprises after treat ing the fabric with a chemical having an oxidizing or reducing action as specifically claimed in this application. The most important type of dyestuffs of thisclass includes vat dyestuffs or their derivatives which as is well-known are amon the fastest colors. Any suitable type 0 vat dyestuifs may be employed. If the vat dyestuif be insoluble it'may be adhered to the prepared warp with the size and when the fabric is suita le aftertreated after weaving, the involuble vat dyestuff will change into a leuco compound to dye the warp on withdrawal from the bath.

Perhaps the most important class of modi-. fied dyes which may be dyed in this manual are the stabilized water soluble derivatives of vat dyestuffs which have recently come on the market. Any suitable type of this general type of dyestufi may be employed. What I preferably employ are the types of dyestuffs described in U. S. Patents Nos.

1,448,251, and 1,57 5,958 which are the water step in the dyeing '1 After weaving,

soluble ester-like derivatives of the leuco compounds of any suitable type of vat dye-' 'stufls whether they be produced from indigo as are the types now beingput on the market by Societ Durand & Huguenin S. A.

or those derived from indanthrenes, which accordin'g'toan article iii The Journal of Dyers and Coloriststfor Feb. 1925 are now .being put on the market by the Scottish Dyes 'Ltd. This class of ester-like derivatives whether they be produced from indigo or from indanthrenes or from any other vat dyestuffs are aftertreated to develop the dyestufii' on the fabric by reforming the dye by the action of a suitable oxidizing agent. F or the purposes of my invention however, any suitable type of a stabilized water soluble derivative of a vat dyestufi may be employedlike the dehydro-indigos as described in German Patents Nos. 217 ,477-220,173-. 237,262-239,314 which are later developedon the fabric by reforming the dye by the action of a suitable reducing agent.

I will specifically describe the application of an indigosol, such as indigosol O. B. for blue sold in America by the General Dy'estufi's Corporation, specifically applying it to the warp in the slashing process. The slasher tank solution may be prepared as follows: 25 ounds of sago or other suitable size are ad ed to 50 gallons of water. To this bath is, also added as the dye ingredi- :ent of the two step dyeing process 1 3 pounds of indigosol blue Q 4.- B the amount depending on the shade desired, preferably previously dissolved in about 3 gallons of 'water. These materials may then be boiled together for about 20 minutes in the size tank after which an amount of sodium nitrite equal in weight to the indigosol used is added. After the contents have Tbeen mixed .well they are then run into the slasher box and the warp sized as usual. It is thus obvious that the goods may be prepared for dyeing the warp with a vat color by adding a small proportion of a vat dye-' stuff, modified, or unmodified to the sizing Imixture. In place of sago, potato, corn, or

an other suitable starch, flour or any other suitable sizing material may be employedv andin place of indigosol O 4 B any type of vvat dyestuif modified or unmodified preferably a stabilized water soluble ester-like de=- rivative of the leuco compound may be employed. In place of sodium nitrite an suitable oxidizing agent may be em loye or if desired-thls may be dispense with. The goods are then woven as hitherto ex- .plained and then sent from the'weave shop to the dye house. 4

the dyestufi is developed on the warp by suitably forming the dVe thereon by any suitable aftertreatment depending on the nature of the Vet dyestuif employed. Where an indigosol or any gosol such as indigosol helio.

water soluble ester-like derivative of a vat dyestuifhas been employed as the first dye ingredient, I preferably reform the dyestuff on the warp by an action of a'suitable oxidizing agent. Although this may be done in any suitable manner, it is preferably done by passing the woven fabric through a jig. To reform the dyestuff by oxidation and to free the oxygen from the sodium nitrite preferably added to the firstdye ingredient.

with the size, I preferably fill the jig with a 2 Tw. sulphuric acid, when dyeing with an indigosol or like ester-like derivative the color Wlll immediately be developed on the warp. If other types of vat dyestuffs or their stabilized water soluble derivatives be employed they may be suitably reduced to the desired leuco compound in any well-, known manner, after which the dyestufi' will be reformed on the fabric by oxidation on exposure to the air. Any suitable type of acid may be employed and'any other suitable type of an oxidizing agent other than nitrite I of soda may be employed. The goods are then washed, soaked and washed; preferably in a jig or if desired dried and mercerized. If not mercerized after the last wash the goods may be re-dyed in the same jig, preferably with 'a three or four per cent solution of a substantive or direct color of a different shade. After this they may be washed, dried and finished in the usual man ner. If it is desired to have the filling threads un-dyed and left a white in a contrasting color to the dyed warp the last step of dyeing the fabric with a direct color may be dispensed with. If it is desired to dye the filling threads a faster color then they may be dyed with a direct color in a contrasting shade, it is obvious that the filling threads may also prior to weaving be similarly treated with a different type of indi- The fabric is woven in the usual manner and. latter on passing the fabric through acid, a blue dyestuff will be developed on the warp and a helio dyestufi' will be dyed on the filling, thus as explained eliminating two of the five steps hitherto necessary in dyeing of this description.

' It is obvious that by simultaneously treating the warp in the slasher box with a size and with a first step of a two step dyeing process, each of which has no appreciable effect on the functioning of the other, weaving the cloth in the usual manner with the filling and treating the fabric with the sec- 0nd step of a two step dyeing process, which acts on the prepared warp to form the dye thereon, that it reduces the cost of manufacturing an all cellulose textile fabric'in contrasting colors bythecost of one entire step in the process, as hitherto explained, namely by the separate stepby treatin the warp separately with th first step of t etwo step dyeing process. It is apparent that I have provided a process which may be readily put in the cotton mills without extra equipment and that I have shown for the first time a method of dyeing cellulose fabrics in contrasting colors with colors faster than any hitherto used for this purpose.

As explained, my invention broadly includes the step in the process of manufacturing an all cellulose textile fabric having component sets of Warp and filling threads of contrasting colors, which comprises,

nent sets of threads with a dye ingredient of two step dyeing process in any stage in the process of manufacture thereof or both sets with a different dye ingredient of a two step dyeing process. Where this is done other than in the size bath however, itis obvious that the cotton mills will have to be provided with additional tanks or other equipment. Where it is desired to thus treat the warp or the filling threads other than in the slashing process they may be treated in exactly the same fashion as hitherto explained with the same strength solutions omitting the addition of the size to the percentage of cellulose and which have subv stantially the same affinity for the same type of dyestuffs as cotton namely, viscose rayon, cupra-ammonium rayon and chardonet rayon, etc., entirely or mixed with cotton.

I employ the word weave in the claims in its broad sense as defined in Websters Dictionary of 1866 which defines it as follows: 1. To unite, as threads of any kind, in such a manner as to form a texture; to entwine or interlace into a fabric as to weave .wool, silk and the like; hence, to unite by close connection or mixture, to unite intimately l v 2. To form, as 'cloth, by interlacing threads; to compose, as a texture of any kind, by putting together textile materials; hence, to form into a fabric; to compose.

It is understood that my invention is not limited to the specific processes described and the various deviations may be made therefrom without departing from the spirit.

and scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

treating before weaving one of said compo- 1. The herein described improved process form the fabric and after weaving treating the fabric with a chemical which acts on one component set to form a dyestuff of one color thereon and acts on the other component set to'form a dyestuif of a different contrasting color thereon.

2. The herein'described improved process of manufacturing an all cellulose text1le;fab ric in contrasting colors, which comprises simultaneously. treating the warp in the slashing roc'ess with a size and with a d e-' stuff, eacl i of whichhas no appreciable e ect on the functionin of the other, treating the filling with a di erent dyestufi, then weaving said warp and filling in the usual manner to form the fabric and after weaving treating the fabric with a chemical which acts onthe warp to form a dyestufl 0 one color thereon and which acts on the filling to form a dyestuif of a contrasting color thereon.

3. The herein described improved process of manufacturing an all cellulose textlle fabric havin component sets of warp and filling threa s of contrasting colors which comprlses treating before weaving one of said component sets with a vat dyestufi, treating the other component set with a different vat dyestufl, then weaving said component sets to-form the fabric and after weaving treating the fabric. with a chemical which acts on one component set to form a dyestufi' of one color thereon and acts on the other component set to form a dyestuff of a different contrasting color thereon.

4. The herein described improved recess of manufacturing an all cellulose textlle fabric in contrasting colors, which comprises simultaneously treating the warp in the slashing process with a size and with a vat v dyestuif, each of which'has no appreciable effect on the functioning of the other, treating. the filling with a different vat dyestuff, then weaving said warp and filling in the usual manner to'form the fabric and after weaving treating) the fabric with a chemical, which acts on t e warp to form a dyestuif of one color thereon and which acts on the filling to form adyestuif of a contrasting color thereon.

5. Thevherein described improved process of manufacturing an all cellulose textile fabric havin component sets of warp and filling threa s of contrasting colors, which comprises treating before weavin one of said component sets -of threads with a stabilized soluble derivative of a vat dyestuif, then weaving said component set with the other component set to form the fabric, after-treat- ,component sets of threads wit soluble derivative of a vat dyestuff, then )fieaving said comfponent set with the other c mponent set to orm the fabric, and treating the fabric to form the vat dy'estuff on the prepare component set.

7. The herein described improved process of manufacturing an all cellulose textile fabric havin component sets of warp and filling thre s of contrasting colors which comprises treating before weaving one of said component sets witha stabilized soluble derivative of a vat dyestuff, treating the other component set with a different stabilized soluble derivative of a vat dyestufi, then weaving said component sets to form the fabric and aftertreatin'g the fabric to form a vat dyestufi on one prepared component setcand simultaneously impregnate the other component set with a vat dyestuif of a different contrasting color. a

8. The herein described improved process of manufacturing an all cellulose textile fab: ric in contrasting colors, which comprises si- -multaneously treating the warp in the slashing process .with a size and with a stabilized soluble derivative of avat dyestufl', each of which has no appreciable effect on the functioning of the other, weaving the fabric in the usual manner with a filling, treating the fabric to-form the vat dyesfuff on'the prepared warp and again dyeing the fabric with a dye of a different nature and color which acts upon the unprepared filling to dye it a contrasting color to the warp.

9. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprises simultaneously treating the warp in the slashing process with a size and with a stabilized soluble derivative of a vat d estufi', each of which has no appreciable e ect-on the functioning of the other, weaving the fabric in the usual manner with a filling, and

treating the fabric to form the vat dyes'tufi on the prepared warp.

10. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprises simultaneously treating the Warp in the slashing process with a sizeand with a stabilized soluble derivative of a vat dyestufi,

each of which has no appreciable effect on the functioning of the other, treating the a, stabilized filling with adifferent stabilized water soluble derivative of a vat dyestuff, then weaving said warp and filling in the usual manner to form the fabric .and aftertreating the fab- -ric to simultaneously form a vat dyestuff on the prepared warp andsimultaneously impregnate the filling with a vat dyestufi of a different contrasting color.

11. The herein described improved recess of manufacturing an all cellulose textile fabric having component sets of Warp and filling threads of contrasting colors, which comprises, treating before weaving one of said component sets with a soluble ester-hke derivative of a vat dyestuff, then weaving said component set with the other component set to form the fabric and then developing the dye on the prepared component set by reforming the dyestuff by the action of a su1 table oxidizing agent on the entire fabric and again dyeing the fabric with a dye of a different nature and color which acts on the unprepared component set to dye it in a contrasting color to the prepared component set.

12. The herein described improved process of manufacturing an all cellulose textile fabric having component sets of warp and filling threads of contrasting colors, which com- I of a suitable oxi izing prises treating before weaving one of said component sets with a soluble ester-like derivative of a vat dyestufi, treatin theother component set with a different so uble esterlike derivative of a vat dyestuif, then weaving said component sets to form the fabric and then simultaneously developing a dye on one prepared component set and a different dye-on the other prepared component setby reforming the dyestufis by the action of a suitable oxidizing agent on the entire fabric.

. 14. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprises simultaneously treating the warp in the slashing process with a size and with a soluble ester-like derivative of a vat d estufl', each of which has no appreciable e ect on the functioning of the other, Weaving the fabric in the usual manner with a filling, then developing the d e on the repared warp by reformln the gestuif by the action gent on the entire fabric and again dyelng the fabric with a dye of a different nature and color which acts upon the unprepared filling to dye it a contrasting color to the warp.

15. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprises simultaneously treating the warp in the slashing process with a size and with a soluble ester-like derivative of a vat dyestufi', each of which has no appreciable effect on the functioning of the other, weaving the fabric in the usual manner with a filling and then developing the dye on the prepared warp by reforming the dyestulf by the action of a suitable oxidizing agent on the entire fabric.

16. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprise simultaneously treating the warp in the slashing'process with a size and with a soluble ester-like derivative-of a vat dyestufl',

each of which has no appreciable effect on the functioning of the other, treating the filling with a different soluble ester-like derivative of a'vatdyestufi', then weaving said warpand filling in the usual manner to form the fabric and then simultaneously developmg the dye on the prepared warp and a different dye on theprepared filling by reforming the dyestuffs by the action of a suitable I oxidizing agent on 'theentire fabric.

17. The herein described improved process v of manufacturing an all cellulose textile fabric having component sets of Warp and fill ing threads of contrasting colors which comprises treating before weaving one of said component sets of threads with'a soluble ester-like derivative of a vat dyestufi' and a potential oxidizing agent, weaving said component set with the other component set to form the fabric and .passing the fabric through acid, in order to develop the dyestufl' upon the prepared component set and again dyeing the fabric with a dye of a different nature and color, which acts on the unprepared component set to dye it in a contrasting color to the prepared component set.

18. The herein described improved process of manufacturing an all cellulose textile fabric having component sets of warp and filling threads of contrasting colors which comprises treating before weaving one of said component sets of threads with a soluble ester-like derivative of a vat dyestuif and a potential oxidizing agent, weaving said component set with the other compofabric through acid in order to develop the dyestufl' upon the prepared component set.

19. The herein described improved process of manufacturing an all cellulose textile fabric having component sets of warp and filling threads of contrasting colors which comprises treating before weaving one of I nent set to form the fabric and passing the said component sets with a soluble ester-like derivative, of a vat dyestuff and a potential oxidizing agent, treating the other component set with a different soluble ester-likederivativeof a vat dyestuf'f and a potential oxidizing agent, then weaving said component sets to form the fabric and passing the fabric through acid in order to develop a dyestufl' upon one prepared component set and a different dyestuif on the other prepared component set.

20. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprises simultaneously treating the warp 1n the slashing process with a'size and with a solu-f ble ester-like derivative of a vat dyestufi' and a potential oxidizing agent, each of which has no appreciable effect on the functioning of the other, weaving the fabric in the usual manner with a filling, and passing the fabricthrough acid in order to develop a dyestuff upon the prepared warp and again dyeing the fabric with a dye of a different nature and color which acts upon the unprepared filling to dye it a contrasting color to the warp. r r

21. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprises simultaneously treating the warp in the slashing process with a size and with a soluble ester-like derivative of a vat dyestufi" and a potential oxidizing agent, each of which has no appreciable effect on the functioning of the other, weaving the fabric in the usual manner with a filling, and passing the fabric through acid in order to develop a dyestuif upon the prepared warp.

22. The herein described improved process of manufacturing an all cellulose textile fabric in contrasting colors, which comprises simultaneously treating the warp in the slashing process with a size and with a soluble ester-like derivative of a vat dyestuff and a potential oxidizing agent, each of which has no appreciable effect on the functioning of the other, treating the filling with a different soluble ester-like derivative of a vat dyestufl and a potential oxidizing agent, then weaving said warp and filling in the usual manner to form the fabricand passing the fabric through acid in order to develop a dyestufi upon the prepared warp and a different dyestuff on the prepared filling.

23. An all cellulose textile fabric in the gray state made up of component sets of threads interwoven with other component sets of threads, one of said component sets being impregnated with a stabilized soluble derivative of a vat dyestufi and another of said component sets being impregnated with a stabilized soluble derivative of a different vat dyestuff.

24. An all cellulose textile fabric in the gray state threads interwoven with other component sets of threads, one of said component sets of threadsbeing impregnated with a stabilized soluble derivative of a vat dyestuff.

25. An all cellulose textile fabric in the gray state made up of component sets of threads interwoven with other component sets of threads, one of said component sets of'threads being impregnated with a soluble ester-like derivative of a vat dyestufl and another of said component sets being impregnated with a soluble ester-like derivative of a different vat dyestuff. 26. An all cellulose textile fabric in the gray state made up of component sets of threads interwoven with other component sets of threads, one of said component sets of threads being impregnated with a soluble ester-like derivative of a vat dyestuff.

'27. An all cellulose textile fabric in the gray state made up of component sets of threads interwoven with other component sets of threads, one of said component sets of threads being impregnated with a soluble ester-like derivative of a vat dyestufl' and a potential oxidizing agent and another of made up of component sets of' said component sets being impregnated with i of threads being impregnated with a soluble 100 ester-like derivative of a vat dyestuif and a potential oxldizing agent.

In testnnony whereof I aflix my signature.

JOHN C. \VATSON. 

